Reed's new radar propels him from aggressive chaser to extreme scientist.

Reed, Sean and Tim face the strongest tornado conditions of the season.

Both Tim Samaras and the TIV team face off with a dangerous tornado. Reed pushes too close, and finds no place to hide.

In Wyoming, Sean Casey captures the shot of a lifetime.

On the last chase of the season in Nebraska, Reed and Tim chase multiple vortices. But when an EF-3 monster touches down right on top of Reed's armored research vehicle, Mother Nature shows who really dominates in Tornado Alley.

Armor offers little protection when the roof blows off the new Dominator.

The deadliest tornado of the season tears a 100-mile path across MS.

Reed pursues a TV weather reporter, and a longtime chaser calls it quits.

Tragedy strikes as Storm Chasers loses one of its own.

Sean's team struggles with a death, and Tim smokes out a monster.

South Dakota spins up the twister of the season.

Reed's cannons are locked and loaded, but multiple tornados prove a hard target for an itchy trigger finger. Tim's team chases in the tornado twilight zone, while Sean weathers a storm of controversy.

Storm and chasers collide in Minnesota for a final showdown.

It’s the most violent tornado season in over fifty years, and on the year’s first chase there’s a storm headed toward downtown St. Louis. While team TWISTEX chases too close to the beast, team Dominator is on the verge of falling apart. TIV team h

In the worst tornado outbreak in over half a century, Mississippi & Alabama are ravaged by hundreds of twisters. Towns are wiped clean off the map, and hundreds of people lose their lives.

A dangerous nighttime chase has team Dominator on a collision course with a tornado they can’t see. While team TWISTEX battles mechanical issues, the TIV team is becoming their own worst enemy.